Can anyone point me to how to fix this issue?

The Forum does get deleted... but seeing the error makes me wonder about where the propblem will kick up later....

Warning: main(layout_utils.php) [function.main]: failed to open stream: No such file or directory in /var/www/html/crm/modules/Forums/ListView.php on line 50

Fatal error: main() [function.require]: Failed opening required 'layout_utils.php' (include_path='/var/www/html/crm/include/..:.:/usr/share/pear') in /var/www/html/crm/modules/Forums/ListView.php on line 50

Sugar CE Version 5.0.0b (Build 3150)
OS Fedora FC4
Forums 5.0

Thanks for your help.